Granted Patent
Utility
US 5,620,147 · App. 08/539,114
Continuous media mill
Inventor:
Mitchel D. Newton
Patented Case
View Patent ↗
Granted: Apr 15, 1997
Filed: Oct 4, 1995
Inventor
Mitchel D. Newton
Assignee (at issue)
Epworth Manufacturing Co., Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.